be a eutectic build up or metal spray that has been eaten away but am surprised that molasses took to it like that in that short a time, wow.
something like CastoTig® 45303 W | Castolin Eutectic
a std cam would need building up for a performance grind i would imagine due to longer dwell times etc etc but that has been eaten all over the place....


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Wayne
Hi Keith, This is why I am looking for an exhaust manifold. It's only 63 years old , do you think Rover will give me warranty
if they were still around . Wayne

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